MISTY算法是由三菱的工程师开发出来的，原始的MISTY算法保密性更强，但所需完成的计算任务则比KASUMI算法更为繁重。

The original MISTY algorithm was developed by researchers at Mitsubishi. The MISTY algorithm was more secure, but more computationally intensive, than the modified KASUMI variant.

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使用加密算法的保密性由这样一个事实保证，即生成与哈希值匹配的明文在计算上是不可行的。

The encryption using crypto algorithms is ensured by the fact that it is computationally infeasible to generate plaintext that matches the hash value.

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当然，谷歌对其搜索和广告算法是保密的。

It does, however, keep its search and advertising algorithms private.

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